“damaged in transit” but Amazon won’t reimburse

I’m receiving a growing number of FBA refunds to customers (from my funds) for “non-returnable items” (usually hazmat related). They are often over $100 per order and they are adding up. Amazon tells me when an item is non-returnable, I simply need to eat the cost when the buyer is refunded (and of course they also get to keep the item). I’m seeing cases lately where it says “damaged in transit” but Amazon is claiming that their “internal team” has determined it WASN’T damaged in transit and they are not responsible for reimbursing me. What can I do?

Again, if this was one or two items, I might let it go, but we’ve lost thousands of dollars to this already. surely there has to be some way to be compensated for this?